Security teams should use one review standard for every in-scope system, with the same access categories, evidence requirements, and exception rules. They also need a current identity inventory so reviewers can see human accounts, privileged accounts, and service identities in the same governance process. That is what keeps certifications defensible.
Why This Matters for Security Teams
SOX access reviews are only defensible when the same review logic applies across every in-scope platform, whether it is an ERP instance, a data warehouse, or a supporting SaaS control plane. The practical problem is that access often spans human users, privileged administrators, service accounts, API keys, and other non-human identities. If those identities are reviewed in separate processes, certification evidence becomes fragmented and exceptions are hard to justify. Current guidance suggests treating access review as a single governance exercise, not a stack of system-by-system traditions.
This matters because weak visibility is still common: NHI Mgmt Group research shows only 5.7% of organisations have full visibility into their service accounts in the Ultimate Guide to NHIs. That gap makes SOX certifications brittle, especially when reviewers cannot trace who owns an account, why it exists, and whether the entitlement is still needed. In practice, many security teams discover those gaps only after auditors challenge the evidence trail, rather than through intentional review design.
How It Works in Practice
A workable SOX review program starts with one inventory and one review standard. The inventory should list every in-scope identity, system, entitlement, owner, and business purpose. The review standard should define the same access categories for all systems, such as standard user, privileged user, service identity, break-glass access, and exception. That standard needs to be paired with clear evidence requirements, because auditors care less about the tool used and more about whether the certification can be reconstructed later.
Security teams should align access review outputs to a repeatable workflow:
- Extract current entitlements from each in-scope system on the same review cycle.
- Normalize identities so human and non-human access can be reviewed side by side.
- Require an owner attestation for each account, including service identities.
- Document exceptions with time limits, remediation dates, and approver names.
- Retain evidence in a format that can be replayed for audit testing.
For control design, the OWASP Non-Human Identity Top 10 is useful for understanding why service identities need the same scrutiny as human accounts, while the NHI Lifecycle Management Guide helps teams connect review evidence to ownership, rotation, and offboarding. Teams that need broader context should also use the Ultimate Guide to NHIs to connect access review to inventory and governance discipline. These controls tend to break down when identity data is split across legacy IAM, PAM, and cloud-native systems because reviewers cannot establish a single authoritative source of truth.
Common Variations and Edge Cases
Tighter review consistency often increases operational overhead, requiring organisations to balance audit defensibility against the effort needed to normalize data across systems. That tradeoff is real, especially when business units argue that certain platforms are “different enough” to justify custom review rules. Best practice is evolving here, but there is no universal standard for separate review methods unless a control owner can show a clear regulatory reason.
Special handling is usually needed for shared admin accounts, emergency access, and machine-to-machine credentials. Shared accounts should not be certified as if they were individual user access; they need named ownership and compensating controls. Emergency access should be reviewed for approval path, use frequency, and revocation timing. Service identities should be reviewed for purpose, scope, and whether the secret or token is still actively used. For organisations with heavy automation, the question is not just “who has access?” but “what system can act without human intervention, and is that still appropriate?” The 52 NHI Breaches Analysis shows why overlooked non-human credentials can become the hidden failure point in otherwise mature governance programs. In practice, SOX review programs fail when exception handling is inconsistent across systems and reviewers cannot prove the same approval logic was applied everywhere.
Standards & Framework Alignment
This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.
OWASP Non-Human Identity Top 10 address the attack and risk surface, while NIST CSF 2.0 and NIST SP 800-63 set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| OWASP Non-Human Identity Top 10 | NHI-01 | Review access across human and non-human identities needs consistent ownership and inventory control. |
| NIST CSF 2.0 | PR.AA-01 | Access authorization and accountability are central to defensible SOX certifications. |
| NIST SP 800-63 | Identity proofing and lifecycle evidence support reliable account ownership in audits. |
Use strong identity lifecycle records so reviewers can verify who controls each account or service identity.
Related resources from NHI Mgmt Group
- How should security teams run access reviews for non-human identities?
- How should security teams govern federated access across cloud and SaaS systems?
- How should security teams govern access when sensitive data is spread across multiple systems?
- How should security teams govern non-human identities that have persistent access?
Deepen Your Knowledge
Reviewed and updated by the NHIMG editorial team on June 3, 2026.
NHI Mgmt Group — the #1 independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org
